Yeah our great room/kitchen/dining are all open to one another. It's a great layout for entertaining. And that's all open to the back covered patio which is about 240 sqft on its own. There's no bifolding door/windows that open it up entirely, which would be awesome, but the back wall is entirely windows. Overall the house is too traditional really to support those bifolding door/window things anyway, they'd look really out of place.
The next house is going to be a super modern glass box built in the middle of nowhere, and it'll have all sorts of cool indoor/outdoor features, including a water feature that flows from indoors, under the wall to the outdoors, and into the pool. I've already got most of that house designed in my head, and my best friend who is an architect, is going to finalize it all for me. Someday...